Mark Boone Junior (born Mark Heidrich;[1][2] March 17, 1955)[3] is an American character actor, best known for his TV roles as Bobby Munson in Sons of Anarchy (2008–2014) and Patrick "Pat" Brown in Last Man On Earth, and film roles in Christopher Nolan's Memento (2000) and Batman Begins (2005), Die Hard 2 (1990), and 2 Fast 2 Furious (2003).

In 1987, Boone co-starred with Richard Edson in Not a Door: A Spectacle, Scott B and Joseph Nechvatal's collaborative art performance at Hallwalls based on the poetry of St. John of the Cross, Flaubert's Temptation of St. Anthony and works of Jean Genet and Georges Bataille.

[9] Boone was a regular cast member on the TV drama series Sons of Anarchy, playing Bobby "Elvis" Munson.

In an episode of the TV series Quantum Leap,[10] he played a biker named Maddog, similar to his character many years later in Sons of Anarchy.

[11] He has appeared in two Christopher Nolan films: Memento,[12] as Burt, the front desk manager at the Discount Inn, and Batman Begins, as Detective Flass, James Gordon's crooked partner.